Paper cutter



1967 D. E. SPAULDING PAPER CUTTER Filed April 50, 1965 2 Sheets-$heet l INVENTOR.

DANIEL E. SPAULDING. i mwfl W ATTORNEY.

Jan. 31, 1967 D. E. SPAULDING 3,301,117

PAPER CUTTER Filed Agril 30. 1965 2 Sheets-Sheet FIG. 6

DANIEL E. SPAULDING.

ATTORNEY.

United States Patent 3,301,117 PAPER CUTTER Daniel E. Spaulding, 407 Franklin St, Fayetteville, N.Y. 87102 Filed Apr. 30, 1965, Ser. No. 452,242 4 Claims. (Cl. 83-455) This invention relates to a cutter device for cutting sheet material such as paper, cardboard, fabrics, leathers, plastics and the like.

The invention has as an object a sheet material cutter embodying a light-weight structural arrangement, the components of which are particularly economical to produce and assemble, the device is simple and convenient to operate and without any possibility of injury, whereby the device can be used by children. I

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is made to the accompanying drawings in which like characters designate corresponding parts in all the views.

In the drawings FIGURE 1 is a perspective view of a sheet material cutter embodying my invention.

FIGURE 2 is a foreshortened sectional view taken on line 2-2, FIGURE 1.

FIGURE 3 is a view taken on line 3-3, FIGURE 2.

FIGURE 4 is a view taken on line 44, FIGURE 2.

FIGURE 5 is a sectional view taken on line 55, FIG- URE 4.

FIGURE 6 is a view taken on line 66, FIGURE 5.

FIGURE 7 is a rear or inner side view of the main body portion of the blade holder.

FIGURE 8 is a view similar to the lower portion of FIGURE 4 showing a modification.

The assembled cutter consists of an elongated guide rail 10 formed with a base portion 11. A web portion 12 extends upwardly from the base 11 and is formed at its upper edge with a bead 13. The guide rail 10 is economically produced by being extruded preferably from a metal such as aluminum.

The guide rail 10 is mounted at its ends to a flat sheet material supporting board 15. The bead 13 is milled away at each end of the guide rail, and the rail is also notched at each end from the bottom of the base portion upwardly. Accordingly, the rail 10 is formed at each end with blades 16. The blades .16 are slid-ably mounted in slots 17 formed in rail supporting members 20. The supporting members 20 are preferably in the form of plastic castings semi-circular in cross section, see FIG- URE 3. The slots 17 being formed in the flat walls 21 of the end members. Each end member is formed with a rectangular compartment 22 into which the blades 16 also extend, see FIGURES 2 and 3. A compression spring 23 is positioned in each of the compartments 22 and is positioned between the blades 16 and the board 15. The end members 20 are secured to the board as by screws 25. The supporting members are affixed to the board '15 in aligned spaced relation for supporting the ends of the guide rail 10, and permitting movement of the base portion 11 thereof into engagement with the sheet material being cut, to clamp the same against the board during the cutting operation. Preferably, a pad 27 of resilient material is aflixed to the underside of the base portion 11, see FIGURES 4 :and 7.

A blade holder is mounted at one side of theguide rail for movement therealong. The blade holder consists of a body portion and a cap portion. The body portion is formed with a side wall 30 terminating at its upper edge, into a thickened portion 31 formed with a flange 35 extending laterally over the bead 13 of the guide rail and terminating in an upstanding wall 36. At the joinder of the side wall 30 and the thickened portion 31, there is an inwardly extending flange 37 postioned under the bead 13, and slidably engaging the web 12 of the guide rail, see FIGURE 4. There is an inwardly extending end flange 39 at each vertical end edge of the wall 33. These flanges also slidably engage the web 12 and are curved at their lower ends as at 40 comparable to the curved surface on the base 11. The end flanges 39 and the lower edge of the wall 30' are formed with a notch to receive an upwardly extending flange 41 formed along the side of the base portion 11. This prevents outward movement of the lower portion of the blade holder relative to the guide rail.

The outer face side of the wall 30 is formed with a recess 43 of trapezium shape to receive a pair of trapezoidal shaped cutting blades 45. The side wall is also provided with arcuate-shaped recesses 47 at each side of the recess 43. The purpose of the slightly deeper recesses 47 is to provide for the insertion of the fingernail under a blade 45 for its removal from the blade holder. The wall 43 is also formed with outwardly extending projections 50. These projections are located within the configuration of the recess 43 and extend through apertures formed in the cutting blades 45 and serve to properly orient the cuting blades, with a cuting portion 53 of each blade extending below the base portion 11 of the guide rail and below the pad 27 carried thereby.

The blades 45 are retained in the recess by a clamp plate 55 overlying the outer surface of the wall 30 and also provided with apertures to receive the propections 50, see FIGURES 2 and 4. The clamp plate is maintained in clamping relation against the blades 45 by a screw 57 extending through an aperture formed in the clampplate and an aperture extending through the wall 30 and into a hexagonal-shaped box 60 formed on the inner surface of the wall 30 and containing a nut 61 into which the screw 57 is threaded. In order to make certain that the clamping plate 55 has secure engagement against the blades 45, the upper portion of the side wall 30 is formed with a rib or projection 63 for engaging between the top portion of the plate 55, see FIGURE 4. The rear or inner surface of the wall 30 is formed with reinforcing ribs 67, 68 and 69.

As previously explained, the blade holder, at its lower edge, has sliding interlocking engagement with the flange 41 formed on the base portion 11 of the guide rail. The upper portion of the blade holder is captivated by a cap member 70, which is formed with an arcuate top portion and depending side flanges 71, which are spaced apart to snugly engage the thickened portion 31 and wall 36, see FIGURE 4. The cap is also formed with end walls 75, each of which is formed with a notch 7 6 slida bly engaging the bead 13 of the guide rail. The cap is also formed with ribs 77 extending transversely between the side walls 71 for engagement with the top surface of flange 33 of the blade holder.

In operation, the sheet to be cut is placed on the board 15 with one side thereof positioned against a guide rule 80 fixed in the top surface of the board and extending perpendicular to the rail 10. The rail 10 is then moved downwardly to clamp the sheet against the board and the cutter holder is moved along the rail. When the rail is moved downwardly to clamp the sheet against the board, the lower cutting edges 53 of the blades 45 extend into a slot 81 formed in the board. Upon movement of the blade holder along the rail, the sheet is severed by the blades 45. As shown in FIGURE 7, the slot 81 may be formed in a bar 82 embeded in the board 15. It will be apparent that the arrangement eliminates the possibility of the user of the device being cut by the blades 45.

What I claim is:

1. Apparatus for cutting sheet'material comprising a rigid extruded guide bar member formed with a base, a web portion extending upwardly from said base and being formed with a bead along its lip-per edge, a blade holder mounted at one side of said Web portion and having slidably interlocking engagement with said .base and bead, a cutter blade detachably secured to said blade holder and having a cutting edge extending below said base.

2. Apparatus for cutting sheet material comprising a rigid elongated extruded guide bar member formed with a base, a web extending upwardly from said base and being formed along its upper edge with a bead, a blade holder mounted on one side of said bar, the lower portion of said blade holder and base having slidably interlocking portions, the upper portion of said blade holder being for-med to encircle said bead, a cutter blade detachably secured to said blade holder and having a cutting edge extending below said base.

3. A sheet material cutter comprising a flat sheet supporting board, an elongated rigid guide bar, said guide bar having a base portion and a Web portion extending upwardly therefrom, said Web portion being formed with a bead extending along the upper edge thereof, a guide bar upwardly from said board, said board being formed in its upper surface with a slot extending parallel to said guide bar, a blade holder mounted at one side of said guide bar and having sliding interlocking engagement with said base and bead, a cutter detachably secured to said blade holder and having a cutting edge extending below said base into said slot.

4. Apparatus for cutting sheet material including an elongated rigid extruded guide bar member formed with a base and a Web extending upwardly from said base and being formed along its upper edge with a bead, a blade holder mounted on one side of said guide bar and having slidably interlocking engagement with said base and bead, a pair of cutter blades detachably mounted in side by side coplanar relation on the outer surface of said blade holder, each of said blades having a cutting edge extending below said base, the cutting edges of said blades diverging upwardly toward the ends of said guide bar.

References Cited by the Examiner UNITED STATES PATENTS 162,841 5/1875 Mayers 83-455 3,130,622 4/1964 Eno 83--455 3,237,497 3/1966 Cook 83455 FOREIGN PATENTS 1,129,927 5/1962 Germany.

500,633 2/ 1939 Great Britain.

WILLIAM s. LAWSON, Primary Examiner.

L. B. TAYLOR, Assistant Examiner. 

1. APPARATUS FOR CUTTING SHEET MATERIAL COMPRISING A RIGID EXTRUDED GUIDE BAR MEMBER FORMED WITH A BASE, A WEB PORTION EXTENDING UPWARDLY FROM SAID BASE AND BEING FORMED WITH A BEAD ALONG ITS UPPER EDGE, A BLADE HOLDER MOUNTED AT ONE SIDE OF SAID WEB PORTION AND HAVING SLIDABLY INTERLOCKING ENGAGEMENT WITH SAID BASE AND BEAD, A CUTTER BLADE DETACHABLY SECURED TO SAID BLADE HOLDER AND HAVING A CUTTING EDGE EXTENDING BELOW SAID BASE. 